- Food is digested > v.small molecules are absorbed into blood

- The heart pumps oxygenated blood to the body, and deoxygenated blood to the lungs

- Organisms inhale oxygen and exhale CO2

- Organisms respire to produce energy required to survive: Glucose + oxygen > water + carbon dioxide + energy

- Anaerobic respiration produces energy without oxygen: Glucose > lactic acid + small amounts of energy

- Stimulus > receptor > CNS > effector > response

- Hormones help regulate the body’s metabolic rate

- The body controls: water, temperature, glucose content by homeostasis

- The body’s white blood cells fight disease

- The body is affected in different ways by many types of drug